Back to: Basic Technology JSS 1
Welcome to class!
In today’s class, we will be talking about drawing instruments and materials. Enjoy the class!
Drawing Instruments and Materials- Definition, Types and Uses
Drawing is a form of visual arts in which a person uses various drawing instruments to mark paper or another two-dimensional medium. Instruments include pen and ink, various kinds of paints, inked brushes, coloured pencil, crayons, pastels various kinds of erasers, markers, and various metals. Digital drawing is the act of using a computer to draw.
Drawing Instruments
Drawing instruments are tools used in technical drawing that does not get consumed while using them. They include the following:
- Drawing Board:
This is a flat wooden board with a smooth, rigid surface. It is suitable for A3 paper.
- Tee-square:
This is a T-shape instrument containing a head and a stock. It is used for drawing all horizontal lines and for setting the paper on the board.
- Set-square:
We have the 450 and 300/600 set-squares. They are used for drawing vertical and angled lines.
- Ruler:
This is a 30 cm wooden or plastic instrument, used for measuring lengths and for dimensioning scaled drawings.
- Protractor:
The protractor is used for measuring angles in degrees.
- French curves:
This instrument is used to draw different shapes of curves.
- Drawing set:
This is a pack containing different drawing items like a pair of compasses, divider, etc.
Drawing Materials
Drawing materials, on the other hand, are items that get consumed with use. They include the following:
1. Drawing paper: The paper commonly used for technical drawing is the A3 paper. Other drawing papers are the A1, A2, A4, etc, depending on the work to be done.
2. Pencil: The 2H pencil is used for construction lines, ‘H’ is for lettering and thickening of visible lines. The HB pencil is good for free-hand sketching.
3. Pencil sharpeners: This is a material used to sharpen all pencils to a conical point shape.
4. Emery cloth: Instead of re-sharpening the pencil, this material is used to restore sharpness to the pencil.
5. Brush: The brush is used to remove dirt from the paper after erasing.
6. Eraser: This material is used to remove mistakes. It is made of soft quality rubber.
Care and Storage of Drawing Instruments and Materials
To care for their drawing instruments, students should do the following:
- Do not use any sharp objects on the edges of the drawing board.
- When not in use, cover the face of the board to avoid dust.
- The Tee-square should not be used as a sword or staff to play with.
- Never use any sharp object on the edges of your set-squares.
- When you are not working with your instruments, keep them on their sheaths and packs.
- Drawing paper should be kept in a flat file or jacket.
In our next class, we will be talking about the Care of Drawing Instruments and Materials. We hope you enjoyed the class.
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